128372499572 has 12 divisors (see below), whose sum is σ = 225487013220. Its totient is φ = 63947638656.

The previous prime is 128372499511. The next prime is 128372499583. The reversal of 128372499572 is 275994273821.

It can be written as a sum of positive squares in 2 ways, for example, as 53993028496 + 74379471076 = 232364^2 + 272726^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59651573 + ... + 59653724.

It is an arithmetic number, because the mean of its divisors is an integer number (18790584435).

Almost surely, 2^128372499572 is an apocalyptic number.

It is an amenable number.

128372499572 is a deficient number, since it is larger than the sum of its proper divisors (97114513648).

128372499572 is a wasteful number, since it uses less digits than its factorization.

128372499572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119305570 (or 119305568 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 59.

The spelling of 128372499572 in words is "one hundred twenty-eight billion, three hundred seventy-two million, four hundred ninety-nine thousand, five hundred seventy-two".